BMW E87 LCI E90 118i 318i Petrol ECU Engine Control Kit N43 DME 7579142 CAS3 Key

BMW E87 LCI E90 118i 318i Petrol ECU Engine Control Kit N43 DME CAS3 Key is a specialized component from the Electronic control modules and ECUs category, designed for BMW vehicles with the N43 petrol engine and manual transmission. The kit includes the CAS module along with the key, which facilitates matching to a specific vehicle configuration and reduces the risk of issues with the immobilizer and starting system.

Specifications and technical data

• SKU: 7579142-7
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7579142
• Substitutable numbers: 12147599881, 7599881, 12147579142, 7579142, 12147640015, 7640015, 12147621178, 7621178, 5WK93709, 61359147220, 9147220
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the CAS module

The CAS module in BMW 1 Series E87 LCI and 3 Series E90 models with the N43 unit is responsible for start authorization, key handling, and communication with other modules in the vehicle. A correctly selected module from this group ensures stable cooperation with the electrical system, ignition system, and security systems, which translates into predictable vehicle behavior during daily operation. The presence of the key in the set facilitates the adaptation process in the car, especially when replacing a damaged module after an electronics failure or starting problems. This solution allows for reducing the time required for configuration and minimizes the number of potential points of incompatibility between the module and the rest of the installation.

Compatibility with the N43 engine and manual transmission

The presented module is intended for vehicles with a petrol engine and manual transmission, which is crucial when selecting electronics for a BMW. CAS modules are designed with a specific drivetrain configuration in mind, which is why using a component matched to the fuel type and transmission type minimizes the risk of communication errors in the vehicle's network. Proper matching of the module to the N43 engine version and manual transmission promotes consistency with the software of other modules, such as the engine control unit or comfort systems. This allows for stable operation of systems responsible for starting, steering column lock, and key handling without the need for extensive installation modifications.

Advantages of using an original BMW module

A component from the Electronic control modules and ECUs group originating from BMW is designed for full integration with the vehicle's electrical architecture. This means matched connectors, appropriate operating characteristics, and compliance with factory diagnostic procedures, which facilitates service and subsequent maintenance. Choosing a used CAS module with a key is a solution that allows you to maintain the factory logic of the security system while reducing repair costs. This type of module can be particularly useful when troubleshooting issues related to a lack of response to the key, starting problems, or communication errors in the vehicle's network.

Professional selection and installation

Before installation, it is recommended to verify the module's compatibility with the specific vehicle configuration and to carry out the appropriate programming and adaptation procedures in the vehicle. A properly selected CAS module with a key allows for consistent operation of the immobilizer system, starter lockout, and communication with other controllers, which is crucial for the safety and reliability of the vehicle. If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other components from the same group, such as comfort modules, engine control units, or other management units, check the available parts in the BMW Electronic control modules and ECUs category.

More about used automotive electronics

When choosing a used CAS module, it is worth knowing the basic principles of selection and checking electronics to avoid compatibility and configuration problems. Practical tips on purchasing and installing used control modules, including engine ECUs and comfort components, can be found in the article: The second life of electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?.